Stenciling-machine.



PATENTED JUNE 23, 1908.

B. P. FORTIN.

STENCILING MACHINE.

APPLICATION FILED MAR. 21, 1908.

2 SHEETS-SHEET 1.

, yen/( 2r By W Affarney Zhf/IZZSQS.

No. 891,766. PATENTED JUNE 23, 1908. B. P. FORTIN.

STENGILING MACHINE.

APPLICATION FILED MAR. 27, 1908.

2 SHEETS-SHEET 2.

)4 Nor/16% UNITED STATES PATENT OFFICE.

BENJAMIN P. FORTIN, OF WOONSOOKET RHODE ISLAND, ASSIGNOR TO UNDERWOODTYPE- WRITER COMPANY, OF NEW YORK, N.

Y., A CORPORATION OF-NEW JERSEY.

.sTENcumG-mAcnmE'.

' a citizen of the United States, residing in Woonsocket, in the countyof Providence and State of Rhode Island, have invented certain new anduseful Improvements in Stenciling-Machines, of which the following is aspecification.

This invention relates to stencil cylinders having foraminous bodieswithin which the ink is introduced, to be conveyed to an ink blanketwrapped around the cylinder and \overlaid by astencil sheet.

The principal objects of the invention are to sim ify and improve theconstruction of the cy-inder and its appurtenances, with a view toeconomy of manufacture, durability and utility.

According to the present invention, the

body of the stencil cylinder or drum is' formed from sheet metalsuitably erforated, and it is fitted at one end upon t e rim of 'aheadhaving a form of a wheel, whereby the \drum is su ported; and at theother end a sheet meta reinforcing head in the form of a' deep ring isfitted tightly within the cylinder and providedwith an external flangeto carry the usual adjustable stop arm or han: dle; the wholeconstituting a simple, rigid and inexpensive construction well adaptedto the urpose.

In place of the usual cast hollow bar extending lengthwise of thecylinder, to receive the ad-holding rods, there is provided a troughrkestructure struck up from sheet metal and receiving tongues or ledgesbent down from the edges .of the main cylinder, said tongues beingsoldered or otherwise se' cured to. the side of .the'trough, therebyforming a depression in thesurfac'e of the cylin- 'der, to receive saidrods andalso the bar to present improvements. elevatlon hold the ends ofthe stencil sheet. Im roved means are also rovided for releasa 1ysecuring the stenc' clamping bar and for facili tating the release ofsald bar.

In the accompanyingldrawings, Figure 1 is a perspective of a cylinderembodying the Fig. 2 is a front artly in section, to "illustrate a artof t e adjustable stop mechanism. ig. 3 is a sectional side elevation ofone end of the cylinder and a stop Fig. 4 shows sectional details of thestencil clamping bar. Fig. 5 is a longitudinal section of the upper partof the stencil cylinder;

Specification of Letters Patent.

Application filed March 27, 1908. Serial No. 423,510.

arm thereon.

Patented June 23, 1908.

Fig. 6 is a erspective view of the struck up sheet meta trough-like barused in joining the depressed edges of the stencil to form a depressionor recess in the periphery of the y 1nder. Figs. 7, 8 and 9 aresectional longitudinal views of the cylinder and its.

whose edges are 'oined along the line 2, Fig.

8. At one and t e cylinder fits tightly upon the periphery 3 of a headin the form of a Wheel 4, whereby the drum is supported. This end of thecylinder abuts against a flange 5 formed upon said head flush with thecylinder. The head 4 is provided witha hub 6 extending into the drum andturning upon a stud 7, which is held by a nut 8 in a standard 9 of theframework; the hub being held on the stud by a ca 10. Said stud formsthe sole support of t e cylinder.

Inserted into the other end of the cylinder is a tightly fitted annularreinforcing head drawn up from sheet metal and in the form of a deepring or tube 11. This tube may be soldered or otherwise secured Withinthe cylinder. stiffening flange 12, and at its outer end an exteriorstiffening flange 13, which abuts against the end of the cylinder 1.

To provide alongitudinal de ression in the cylinder for receiving the paholding rods etc., tongues or flanges 14 are bent downwardly or inwardlyfrom the edges of the plate which forms the cylinder 1; and said tonguesare caught within the sides 15 of a channel bar whose bottom isdesignatedas 16 and constitutes the bottom of the depression of thecylinder. The channel bar is struck up from sheet metal and firmlyclasps the tongues 14, towhich it is soldered or otherwise secured; thismaking a light, stiff, inexpensive construction.

The ink pad 17, Fig. 11, is held by bars 18, which are inserted in holes19 at one end of the cylinder depression, said holes formed in theflange 12 or in an inwardly projecting car 20 formed u on said flange.lie along the bottom of the depression in the cylinder, and at theirother ends are caught by releasable hooks 21 mounted upon pivot screws22 on the wheel 4.

At its inner end it has an interior Said bars 18 shown) are held in saiddepression by means of a clamping bar 23 fittin tightly between the endsof the pad 17, and iaving at one end which revo projections 24 to fit inholes 25 in the wheel 4. At its other end the clamping bar is rovidedwith a erforation 26 to receive a holt 27 which wor s in a hole 28 inthe ear 20. Said bolt extends throu h an ear 29 rojecting inwardly fromthe ead 11, an is pro vided with a finger piece 30 and a sprin 31 whichholds the bolt in place. Upon pufiin out the bolt by means of the head30, the stencil clamping bar 23 may be withdrawn the same being providedwith a finger-piece 32 projecting in through an aperture .33 formed inthe depression, so that by lifting the said fingeriece, this end of thebar is thrown up, an it may then be withdrawn lengthwise to release thecatches 24. The

head 30 is provided with a pin 34 normally occupying a recess 35 in theear 29. When the head 30 is pulled out to release the sheet clamp 23,the head may be turned around so that the in -34 may ride upon the faceof the ear 29, tfiereby holding the bolt released.

There is usually provided u on the framework a stop 36, to be engage bya stop 37, ves with the cylinder 1. According to the presentimprovements, this stop 37' is mounted upon a sheet metal arm 38 havingat its inner end claws 39 bent in to catch within the head 11, andhaving at'its outer end a pair of struck up cars 40 to receive the innerend of a swiveled handle 41.

' 42 to grip the flange 13, said plates being drawn towards eachother bymeans of thumb screws 43. A ledge 44 is formed on the plate 42 to take abearing on the plate 38 and the plates are also connected by a shoulderscrew 45. .An index 46 on the outerplate may cooperate with graduations47 on the flange 13 to aid in setting the stop arm or plate 38. The stop37 is of usual construction and mounted in a boss 48 suitably securedupon the plate 38.

Having thus described my invention, I claim: 1.. A stencil-drum comrising a perforated plate curved to form a c linder, the cylinderprovided with heads an having a longitudinal channel or depressionbetween said heads to receive clamping devices for the sheets wrappedaround the cylinder, adjacent edges f t e perforated plate being bentdown to form the sides of said channel, and a channelbar forming thebottom of the depression, and mclosing said sides and secured thereto.2. A stencil-drum comprising a perforated ,cylinder of sheet metalattached at one end to-a head which is revolubly mounted upon a devicewhich constitutes the sole support of the drum, and a second head beingattached to the other end of the cylinder also,

The plate. 38 cooperates with another sheet metal plateand having theform of a reinforcing tube of sheet metal inserted within and fittedtightly to the cylinder and formed at its inner end with an interiorstiffening flange, said cylinder provided between said heads with alongitudinal channel or depression to receive pad-holding rods, saidflange formin one end of said channel or depression and having holes orseats to receive the ends of said rods.

3. A stencil-drum comprising a perforated cylinder of sheet metalattached at one end to a head which is revolubly mounted upon a devicewhich constitutes the sole support of the drum, and a second head beingattached to the other end of the cylinder also, and having the form of areinforcing tube of sheet metal inserted within and fitted tightly tothe cylinder and formed at its inner end with an-interior stiffeningflange, saidcylinder provided between said heads with a longitudinalchannel or depression to receive pad-holding rods, said flange forminone end of said channel or depression an having holes or seats toreceive the ends of said rods; and fastening devices mounted upon thefirst head and projecting into said channel at its otger end, to securethe other'ends of said ro s.

4. A stencil-drum comprising a perforated cylinder of sheet metalattached at one end to a head which is revolubly mounted, and-a" sion,said bar having a projection at one end to catch in a recess or seatformed in the first head of the drum, 'andhaving at the other end atongue pressed bolt.

- 5. A stencil-drum comprising a perforated cylinder of sheetmetalattached'at one end to a head which is revolubly mounted, and asecond head being attached to the other end of the cylinder, and havingthe form of a reinforcin tube of sheet metal inserted within an fittedtightly-to the cylinder and formedatits inner end with an interiorstfiening flange, said cylinder provided between said heads with alongitudinal channel or depression, and said flange forming one endperforated to receive a springof said channel, and a detachable bar forsecuring the ends of the stencil sheet in said de ression, saidbar'having a projection at one on to catch in a recess or sheet formedin the first head of the drum, and having at the other end a tongueperforated to receive a spring-pressed bolt; said ton ue projectingwithin the drum to form a er-piece for lifting the end of the bar fromthe depression or channel.

6. A stencil-drum comprising a perforated cylinder of sheet metal, ahead attached to the end of the cylinder, and having the form of areinforcing tube of sheet metal inserted within and fitted tightly tothe cylinder and formed at its inner end with an interior stiffeningflange, said cylinder provided with a longitudinal channel or depressionto receive pad-holding rods, and said flange forming one end of saidchannel, a detachable bar for securing the ends of the stencil sheet insaid depression, said bar having a projection at one end to catch in arecess or seat provided in the drum, and having at the other end atongue perforated to receive a springpressed bolt, one end whereof ismounted in a perforation in said flange, and an ear projecting inwardlyfrom said head to receive the other end of said bolt, the latterprovided with a knob, and the knob provided with a pin which by turningsaid bolt may be caused to engage said ear to hold the bolt released.

7. A stencil-drum having a longitudinal depression or channel betweenits ends, in combination with a sheet holding bar within said channeland having at one end means for detaehablyengaging the end of the drum,and provided at its other end with a tongue whichprojects within thedrum to form a finger-piece for lifting the bar, and releasable meansfor retaining the end of the bar which carries said tongue.

8. A stencil-drum having a longitudinal depression or channel betweenits ends, in combination with a sheet holding bar within said channeland having at one end means for detachably engaging the end of the drum,and provided at its other end with a tongue which projects within thedrum to form a finger-piece for lifting the bar, and a spring-pressedbolt mounted upon the drum to engage the tongue-carrying end of saidbar.

9. A stencil-drum having a longitudinal depression or channel betweenits ends, in combination with a sheet holding bar within said channeland having at one end means for detachably engaging the end of the drum,and provided at its other end with a tongue which projects within thedrum to form a finger-piece for lifting the bar, and a spring-pressedbolt mounted upon the drum to engage the tongue-carrying end of saidbar; said bolt being provided with means for mechanically detaining itin bar-releasing position.

10. A stencil-drum having a longitudinal depression or channel betweenits ends, in combination with a sheet holding bar within said channeland having at one end means for detachably engaging the end of the drum,and provided at its other end with a tongue which projects within thedrum to form a finger-piece for lifting the bar, releasable means forretaining the end of the bar which carries said tongue; padholding rodsengaging seats in the same end of the channel at which said tongue isarranged, and hooks at the other end of the channel to engage the otherends of the rods.

11. The combination with a stencil drum mounted upon a framework andhaving an open end provided with an external flange, of a stop upon theframework, and a stoparm adjustable around said flange and comprising asheet-metal plate having claws to catch within the drum, a clampingplate to 006 erate with the first plate to bind upon said flange, andthumb screws connecting said plates.

12. The combination with a stencil-drum mounted upon a framework andhaving an open end provided with an external flange, of a stop upon theframework, and a stoparm adjustable around said flange and comprising asheet-111etal plate having claws to catch within the drum, a clampingplate to cooperate with the first plate to bind upon said flange, thumbscrews connecting said plates, and ears struck up from the ends of saidarm to carry a swiveled handle.

BENJAMIN P. FORTIN.

Witnesses:

S. T. SMITH, Jr., EUGENE E. BASQUIN.

